Electric lock.



No. s89,|33. Patented Das.` n, |9ol. H. sEEwALn.

ELECTBIU LUCK.

(Application filed Apr. 24, 1901.)

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(No Model.) 4 Sheets-Sheet l.

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No. 689,I33. Patented Dec. I7, |9Ul.

H. SEEWALD. ELECTRIC LUCK.

(Application tiled Apr. 24, 1901.)

4 (No Model.) 4 Sheets-Sheet 2.

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H. SEEWALD.

ELECTRIC LUCK.

(Application led Apr. 24, 1901.,

(No Model.) 4 Sheets-Sheet 3.

No. 689,133. Patented Dec. I7, |9Dl.

' H. SEEWALD.

ELECTRIC LOCK.

(Application filed Apr. 24, 1901.)

4 sheets-:sheet 4.

'(No model.)

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ELECTRlC LOCK.

'SPECIFICATION forming part of Letters Patent No. 689,133,datecl December 17, 1901.

Serial No. 57,310. (No model.)

To @ZZ whom t may concern:

Be it known that I, HERMANN SEEWALD, a citizen of Germany, residing at Pssneck, in the Duchyof SaXe-Meiningen,Germany, have invented certain new and useful Improvements in LocksSet in Motion by Electricity;

and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to electric locks for safes, treasuries, or the like, the object being to provide an improved lock of this class having a frame provided with a rack in which is arranged a movable bolt moved forward and backward by means of a toothed wheel set in motion by a watch-spring and a crank after an electric current has detached several anchor-holds through the setting in of dilerent contacts, whereby it is only possible to openthe lock when one has access to the contacts arranged at various places and understands their mode of action.

With this object in view the invention consists in the improved construction, arrangement, and combination of parts hereinafterl fully described and afterward specilically claimed.

The drawings appended hereto represent such a lock.

Figure l shows the same diagram matically in a closed position, and Fig. 2 in an open position. Fig. 3 represents, in elevation, the frame with the bolt and appurtenances. Fig. 4 is a plan of the parts shown in Fig. 3. Fig. 5 shows, on an enlarged scale, one form of contact device. Fig. 6 is a sectional view of the same. Fig. 7 shows the lock ready for use, the case being partly in section and partly broken away.

The toothed wheel d, set in motion by a watch-spring a and capable of being held stationary by a sliding pawl b catching in the notch c of a disk c, turns around the arbor d and engages the rack e' of the frame e, said rack being shown in dotted lines. In the frame e there is a boltf, so arranged as to be movable by means of the guide-rod f, provided with a springf", the bolt having a kceperf.

The armature g of the magnet A keeps back the contact-slide 7L connnunicating with the positive cond noting-wire 2 of the magnet B, said slide being provided with a spring 7a', by which it is held normally against' the contact-piece t, with which the wire l is connected. The pin 7L serves for drawing back the slide if the contact has been closed. The negative conducting-wire of the magnet B extends to the battery and forms, if the current is closed, with wires l and 2 a circuit. The slide b, which is provided with a pin h for drawing it back to its Yformer place after being detached, is held by armatures tand Z of the magnets B and C. The armature Z is held fast in its released state by a latch Z", pivoted on a pin l", said latch being detached again by means of the pin Z. By the wires 4 and 5 the magnet C communicates with the contact m, which moves over the insulatingring m of the watch m. The pawl-lever n', placed in the horizontal plane and pivoted on pin n, serves to detach bolt j', which is held fast by latch o, provided with a pin o and a spring 0, as well as by armature p of the magnet D of the other fold or wall. By wires 6 and 7 the magnet D is to be put in communication with the source of the current.

The mechanical effect of the lock is the following: When by connection of the wires 8 and 9 a circuit is completed and the magnet A is energized, and thus the armature g is attracted and the slide h moves to contact with the contact t', the circuit is closed by wires 4 and 5 of the magnet C through the medium of the watch-contact, which only operates at the time iixed through the hole q in. the in sulating-ring, whereby the armature Zis held fast by the latch l. By connection of the conducting-wires l and 3 the armature of the magnet B is attracted and the released slide b is drawn back by the spring b", so that the turning back of the frame c with the slidef is only prevented by armature p of the magnet D. If the circuit of this magnet is now closed by the connection of the wires t and 7, then the armature p is attracted and the :frame c, with the boltf, is turned backby the watch-spring ct and the toothed wheel cl and the lock is now opened, whereby the keeper j" of the bolt f is placed behind the pawl-lever n. If it is intended to now close the IOO lock again, then the latch 0 is lifted out with the aid of the pin 0 and the frame e is turned back to its old place by a crank fixed to the arbor d', whereby the spring f" is pressed together, inasmuch as the pawl-lever n' keeps back the bolt f. By means of the pin b the slide b is now thrown back again in the notch c' of the disk c, and the armatures lo and Z catch in again after the latch 1 has been detached by pin Z. The hand of the watch-contact has meanwhile moved further on and the current is interrupted again, so that it yet needs only a drawing back of the slide h by the pin h. It this is also done, the door can be shut again, at which the paWl-lever n is shoved aside and now sets free the bolt f, so that the latter is drawn to the fore part by spring f and is again held fast by armature 29. To open the lock again, the proceeding described must be repeated. Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is f An electric lock provided with a bolt f a frame c and toothed Wheel d, for setting it in motion, electromagnets A, B, C and D having armatures for preventing the Withdrawal of the bolt, and a Watch-contact whereby the circuits of the magnets are broken to release the armatures, substantially as described.

In testimony whereof I aftix my signature in presence of two Witnesses.

HERMANN SEEWALD. Witnesses:

J. STEPHAN, A. BRUTIGAM. 

